When a police detective is asked to look into the death of a friend, it should be straightforward; but the only real clue is that he was doing a study into the death of John the Baptist (John Levi). Together with his friend's children, they apply detection skills to discover who killed John Levi, after all, whoever heard of anyone in danger from doing a Bible study? When they dig deep into the background, their investigation reveals forces at work that represent a real menace, as they are drawn into a struggle against evil much closer to home.